Maths in the Bedroom


Maths in the Bedroom

The bedroom is an area of the house most closely associated with relaxation and rest.

Have we finally found a room without numeracy?

The message of these workshops is that maths is always present, even in the bedroom. Let us take a look at a few examples.


The main function of most bedrooms is to provide a safe and comfy place for us to sleep.

It is recommended that we try to get approximately eight hours of sleep a night.

This is another example of time-management.

A man sleeping beneath a duvet with an arm stretched out holding an alarm clock

If you need to be up for a certain time and you want to get the right amount of sleep, what time do you need to go to bed?


At some point in your lives, you will find yourselves shopping for bedding. What size is your bed?

Thankfully there are standard bed sizes and most bedding is sold in these sizes. However, if you're more of a blanket person, you will need to know the size in metres and centimetres.

A measurement guide for different mattress sizes (cot - 75×142cm, small single - 75×190cm, single - 90×190cm, small double - 120×190cm, double - 135×190cm, king - 152×198cm and super king - 183×198cm)
Mattress size guide provided by

A different numeracy issue is faced by duvet users - Tog ratings

What is a Tog?

Duvets come in standard bed sizes but also with a tog value. Tog stands for Thermal Overall Grade; this means it is a measure of how well the duvet holds heat. The higher the tog rating, the warmer the bedding.

A heap of white pillows and duvets


As people tend to store their clothes or get dressed in the bedroom, we decided to add this section here.

You may have already guessed the main numeracy involved with clothes - sizes

For children these are normally straight forward, by selecting items for their age range.

As you get older though, sizes of clothes become more complicated. You will need to know or be able to measure various lengths, heights and widths of the body.

A chart showing how to measure various aspects of the body for choosing the correctly sized school uniform
This is a school uniform size guide from

Another application of numeracy when it comes to our wardrobes is working out how many different outfits you can put together without repetition - this is a real-world application of combinatorics

An outfit tree diagram going from a single person, branching to 3 different top styles which each then branch down to 4 different bottoms, demonstrating a total of 12 different clothing combinations.
A combinatoric tree taken from

The image above shows that having 3 different tops and 4 different bottoms can produce 12 different outfits.

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